Bitumen roofing for your flat roof

Do you have a flat roof that needs replacing, or are you installing a new roof? At Smienk Dakwerken, we work with two-layer bitumen roofing for a durable and watertight result. We expertly burn off the seams and neatly finish the edges, with a 10-year warranty.

A new flat roof or due for replacement? Smienk Dakwerken installs durable, waterproof bitumen roofing, with a 10-year warranty on the work.

4.8

99 reviews

Free & no-obligation quote

Clarity regarding costs and work within 24 hours

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4.8

99 reviews

Why two layers bitumen make a difference

The best choice by Smienk Dakwerken

Why do we almost always choose two layers of bitumen for a flat roof? Because a single layer is cheaper, but lasts much shorter and leaks at the seams sooner.

We lay a base layer that stabilizes the entire structure and a top layer with mineral coating that protects against sun and weather. We expertly burn off the seams, as this is precisely where leaks occur due to faulty workmanship. Where necessary, we immediately address the roof insulation included, so you don't have to open up the roof twice.

This is how we lay your bitumen roof

View our working method

Step 01

Free roof inspection

We carefully inspect your roof, discuss the situation, and provide honest advice on the best solution. You are under no obligation.

Step 02

Clear quotation

Within 24 hours, you will receive a detailed quotation without surprises. After your approval, we will schedule the work in consultation with you.

Step 03

Professional execution

Our dedicated team installs your new bitumen roofing, cleans everything up neatly, and delivers the work with a 10-year warranty.

When is your bitumen roof In need of replacement?

Recognize the signs

Bitumen roofing lasts a long time with proper maintenance, but not forever. Blistering, cracks, bare spots where the mineral has disappeared, or recurring leaks are signs that the top layer is worn out. Sometimes a new top layer is sufficient; sometimes the entire structure needs replacing. After inspection, we will tell you honestly what is still usable and what needs to be renewed.

How much does a cost bitumen roofing?

Clear rates

The costs depend on the surface area, the condition of the roof, and whether the insulation is being renewed at the same time. After a free inspection, you will know exactly what is needed and what it will cost. You will receive a fixed price in writing; you pay what is stated in the quote, without surprises. The inspection is free and without obligation.

We work with premium brands

For long-lasting results, we work exclusively with proven quality brands, including Monier, Wienerberger, and Bitasco.

Recently performed roof renovations

Portfolio

From a completely renewed tiled roof to a flat roof with new insulation and zinc work: our work speaks for itself. One of the projects we are most proud of is a tiled roof renovation where the client was satisfied from start to finish.

Root-resistant bitumen roofing installed in Veenendaal

In Veenendaal, we installed a new flat roof with root-resistant bitumen.

Flat roof in Amersfoort renewed with two-layer bitumen roofing

In Amersfoort, we carried out a roofing project in which root-resistant bitumen roofing was installed.

100 m² flat roof fitted with new roofing in Voorthuizen

For this project, we ensured a sleek finish and a future-proof result, where quality and craftsmanship came first.

What our customers say

Customer experiences

Our customers rate us 4.8 on Google. View their experiences and discover why they choose Smienk Dakwerken.

Rating

4.8

Based on 99 reviews

google

Excellent roofing work and craftsmanship. The collaboration went well; often things don't go according to plan on projects, but we resolved it perfectly. Thanks also for the extra service; we got the unblocking of another gutter included, which saves us some climbing around. I look forward to having them back for my next roofing project.

Nick Grotenhuis June 20, 2026

google

We hired Smienk Dakwerken for maintenance on our roof, and we were extremely satisfied. Communication regarding the work and costs was clear from the start. The team worked carefully and left everything clean. The result looks professional and gives us great confidence for the future.

Patrick Zolotucho June 17, 2026

google

Smienk delivered excellent performance in repairing the damage to our flat roof.

Aisa Jansen May 20, 2026

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Bitumen roofing for your flat roof

Free & no-obligation quote

Why two layers bitumen make a difference